Version 0.1 https://drive.google.com/open?id=1Er7WKz09m9ctzeEk3jxSyDXjDc1OzInK
Note: When you set the system time on the PCW (-t option), the second is always set to 0.
==== Superbrain variant ====
Versdion Version 0.2 https://drive.google.com/open?id=1UZq4VTQw32Y4G1tUflGlZpAKdPz19NY9
==== Usage ====
== Technical info ==
This is the technical application manual for The uRTC-8 uses the 72421 Epson RTC -72421 chip used in uRTC: [[Media:Epson RTC-872421 datasheet. pdf|Datasheet]] [[FileMedia:Rtc72421 appman.pdf|Application Manual]]
Of particular interest are the 16 registers:
rtcctrlE .db RTCBASE+0Eh ; control register E
rtcctrlF .db RTCBASE+0Fh ; control register F
== Prices ==
This is a summary of the prices I have posted to the forum so far.
I am sorry that the assembled prices are what they are, but it is a time consuming and dreary job, not to mention the effort and cost to acquire the parts. [Update Dec 2020] Sadly, the clock chip used in this design has become much more expensive (the last one I bought cost over £10) and there are many counterfeits coming out of China, so it is risky to buy cheaply from there. My last three orders of clock chips turned out to be fake parts - not one of them worked. So I have to buy from the expensive UK vintage chip suppliers. As a result, I have had to put the price of the uRTC up to compensate.
{| class="wikitable"
! Item !! Price
|-
| uRTC-8 assembled || £34£44.00
|-
| Z80 Shim assembled (LHS or RHS) || £17.50